Messages in this thread |  | | Date | Wed, 27 Mar 2019 09:08:21 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH v2 RFC/RFT 0/5] Save single pages from CMA area |
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On Tue, Mar 26, 2019 at 04:01:26PM -0700, Nicolin Chen wrote: > This series of patches try to save single pages from CMA area bypassing > all CMA single page alloctions and allocating normal pages instead, as > all addresses within one single page are contiguous. > > We had once applied the PATCH-5 but reverted it as actually not all the > callers handled the fallback allocations. Per Robin's suggestion, let's > stuff alloc_pages()/free_page() fallbacks to those callers before having > PATCH-5.
Given the problems this has caused so far I'd like to see a good explanation of why this optimization is so important that all the churn is even worth it..
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